Electric furnace.



S. PEAC OCK ELECTRIC FURNACE.

APPLICATION FILED SEPT. 7. 1912.

1,090,.1 O7. Patented Mar. 10, 19M

TOM METER- FmCO'C 1 I Wan 7 UNITED STATES PATENT orrrcn.

v SAMUEL PEACOGK, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

nnnc'rnro FURNACE.

Patented Mar. 10,1914.

Application filed September 7, 1912. Serial No. 719,158.

especially adapted for the production of carbo-nitrids, and has for its object to produce a furnace of this nature which will be more efiicient in action and simpler in construction than those heretofore proposed.

To these ends, the intention consists in the novel details of construction and combinations of parts more fully hereinafter disclosed and particularly pointed out in the claim.

Referring to the accompanying drawings forming a part of this specification, in which the figure is a diagrammatic illustration of a furnace made in accordance with my invention, 1 indicates any suitable furnace walls, but preferably provided with a carborundum lining 2, and an outer metallic casing 3.

4 represents a water jacket, surrounding a lower extension of the casing 3, located in a cavity 5 between the brickwork supports 6, and 7 represents inlet and outlet tubes for the said jacket 4.

8 and 9 represent two horizontal electrodes entering the high temperature zone of the furnace, and 10 represents an adjustable electrode adapted to coact with the electrodes 8 and 9.

11 represents the charge,generally consisting of a metallic oxid andcarbon, and preferably briqueted.

12 represents gas-tight pipes or passages for feeding the charge into the furnace, and 13 represeht sga 'pipe for admitting gaseous iiitrogemor producer gas to the furnace.

lt rep resentsapipeleading to a manometer for "ascertainjng' the pressure on the interior ofthe furnace, and 15 represents a suitable conveyor for continuously removing the products from the furnace.

16 represents sin-exit, suitably closed by l means not shown, through which the products pass, and 17 represents a means foradusting the electrode 10 to and from the electrodes 8 and 9.

18 represents a hood for supporting the ad usting means 17 and electrode 10, and is which access may be had to the furnace.

20 represents a pipe communicating with the lower extension of the furnace for drawing off the furnace gases.

The operation of my furnace is as follows :-The electrode 10 is adjusted quite close to the electrodes Sand 9, and the furnace is suitably charged with a mixture of say magnesium oxid and carbon. Gas, such as free nitrogen or producer gas, is now is turned on. Since the electrodes are quite is small, andtherefore a large amperage may pass. This has the efiect of heating up thatportion of the charge which is immediately adjacent the electrodes, and ran dering same conductive. As the charge becomes heated and conductive, the electrode 10 is gradually withdrawn until a considerable portion of the charge is rendered conductive, and the reaction proceeds over a larger area. As the carbo-nitrid is thus formed, it passes by gravity down through the water jacket 4, and is there gradually cooled, s'till in an atmosphere of nitrogen, or in an inert atmosphere. After the prod- 'uct is sufiiciently cooled, the conveyer 15 removes the same through the exit 16. Since the charge may be continuously fed in through the pipes 12, and the product may be continuously removed from the furnace, it is obvious that the process may be carried on without substantial interruption.

When producer gas is used, its contained nitrogen is being constantly removed through the reactions taking place, and its contained carbon monoxid is being constantly enriched through the carbon monoxid liberated by said reactions, and therefore the producer gas withdrawn through quality over that admitted through the provided with a hand-hole 19, through admitted through the pipe 13, and current close together, the resistance of the charge the pipe 20 will be of a greatly improved shown, since it is very desirable that no free oxygen, carbon dioxid (30 or Water vapor" one of said eiecirodee; air tighi; means com prising two pipes oioseai at their outer ends for introducing charge material; air tight means comprising :& valved pipe for introducing gas; a refractory lining tapered in cross section and providing a, tapered veriaicai chamber; ell-outer air tight casing havmeme? mg an extension; a, pipe for carrying ofi gasesfrom said extension; a water jackefi carried by said extension concentric with soiri chamber located below the hightempera-fourezene of the furnace and conveyer means for continuously removing the product from the furnace as fast as it is formed, substantially as described.

In testimony whereof, I afiix my signature in presence of two Witnesses.

' SAMUEL PEACOCK. Nitnee'ses:

T. A; NIrHERSPOON, N.- CURTIs LAMMOND. 

